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  <title>Document</title>
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<body>
  <script>
    //  const arr1 = ['张三', '李四', '王五']
    //  const arr2 = arr1

    //  arr1.push('赵六')

    //  console.log('arr1', arr1)
    //  console.log('arr2', arr2)


    const arr1 = ['张三', '李四', '王五']
    const arr2 = [...arr1]

     arr1.push('赵六')

     console.log('arr1', arr1)
     console.log('arr2', arr2)
  </script>
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